Written by AJ Services Group | Published on June 2025
Rewiring a 3-bedroom house in NSW typically costs between $8,000 and $15,000, though older homes or those with complex layouts can push that figure higher. This guide covers what drives the price, what the process looks like, and what Sydney homeowners should watch out for before booking a job.
Understand the typical cost range for house rewiring in NSW
Most 3-bedroom homes in Sydney fall between 120 and 180 square metres. That size range gives electricians a reasonable baseline, but the final quote depends on a lot more than floor space.
Labour is the biggest cost component in any rewiring job. Licensed electricians in NSW charge between $80 and $120 per hour. A full rewire on a standard 3-bedroom home takes anywhere from 3 to 6 days of work, depending on the number of circuits, power points, and light fittings involved.
Materials add another significant chunk. Cable, conduit, switchboard components, circuit breakers, and new power points all add up. Expect materials to represent 30 to 40 percent of your total quote.
| Home Type | Estimated Cost Range | Typical Timeframe |
|---|---|---|
| Modern 3-bedroom (post-1990) | $8,000 to $10,500 | 3 to 4 days |
| Older 3-bedroom (1960s to 1980s) | $10,000 to $13,500 | 4 to 5 days |
| Federation or heritage home | $13,000 to $15,000+ | 5 to 7 days |
| Double storey 3-bedroom | $11,000 to $16,000 | 5 to 6 days |
These ranges reflect standard work in the Greater Sydney area. Costs in regional NSW may be slightly lower, but access to licensed tradespeople can be more limited outside metro zones.
Identify what drives the cost of rewiring your home
No two rewiring jobs are identical. Several factors push costs up or bring them down, and understanding them helps you prepare an accurate budget before getting quotes.
- Age of wiring: Homes built before 1980 often contain old rubber-sheathed or cloth-insulated wiring. This type of wiring degrades over time and requires full replacement. It also takes longer to remove safely.
- Switchboard condition: Many older Sydney homes have ceramic fuse boards that need upgrading to modern circuit breakers. A switchboard upgrade alone can cost $800 to $2,500.
- Number of circuits: A basic rewire covers lighting and power circuits. Adding dedicated circuits for air conditioning, ovens, or EV chargers increases the scope and cost.
- Wall and ceiling access: Brick veneer or double brick homes make cable routing harder than timber frame construction. Cutting into masonry takes time and specialist tools.
- Smoke alarm compliance: NSW regulations require interconnected smoke alarms in all homes. If your home does not already meet this standard, it must be addressed during rewiring work.
- Permit and inspection fees: In NSW, electrical work must be certified. Your electrician will lodge a Certificate of Compliance for Electrical Work (CCEW). Some jobs require a council or network provider inspection, which adds a small additional cost.
At AJ Services Group, we include a detailed scope of work in every quote so you know exactly what is and is not covered before any work begins.
Compare switchboard upgrade costs included in rewiring jobs
A switchboard upgrade is often bundled into a full rewire. NSW Fair Trading and Ausgrid safety guidelines recommend replacing outdated fuse boxes with modern safety switches and circuit breakers during any major electrical upgrade.
Modern switchboards include residual current devices (RCDs) and miniature circuit breakers (MCBs), which protect against electric shock and overload. These are now mandatory in new installations under AS/NZS 3000:2018, the Australian wiring rules.
| Switchboard Component | Estimated Cost | Notes |
|---|---|---|
| Basic switchboard upgrade (8 circuits) | $800 to $1,200 | Suitable for smaller homes |
| Mid-range upgrade (12 to 16 circuits) | $1,200 to $2,000 | Most 3-bedroom homes |
| Large or complex switchboard | $2,000 to $2,500+ | Double storey or high-load homes |
| Three-phase switchboard | $2,500 to $4,000 | Homes with three-phase supply |
If your switchboard upgrade is done as part of a full rewire, electricians can often bundle the labour cost. Getting them done separately at different times will cost you more overall.
Learn what the rewiring process looks like in a Sydney home
Knowing the process helps you plan around the disruption. A rewire is a significant job and your home will not be fully liveable during the work. Most families temporarily relocate for at least part of the process.
- Site inspection and quoting: A licensed electrician inspects your existing wiring, switchboard, and circuits. They map out the scope and provide a written quote.
- Permit lodgement: The electrician notifies the relevant network provider (Ausgrid or Endeavour Energy in most of Sydney) before work begins.
- Old wiring removal: Existing cables are pulled from walls, ceilings, and subfloor spaces. This is the most labour-intensive part of the job.
- New cable installation: New TPS (twin and earth) cable is run through wall cavities, roof spaces, and conduit. This stage also includes installing new power points and light fittings.
- Switchboard installation: The new switchboard, RCDs, and circuit breakers are fitted and connected.
- Testing and certification: The electrician tests every circuit, issues the Certificate of Compliance for Electrical Work, and notifies Ausgrid or Endeavour Energy of the completed work.
The whole process typically takes 3 to 6 working days for a standard 3-bedroom home in Sydney. Heritage homes or properties with complex layouts can take longer.
Spot the warning signs that your home needs rewiring
Many Sydney homes built before 1980 are still running on their original wiring. That wiring is now 40 to 60 years old and poses a genuine safety and insurance risk. Knowing the warning signs can help you act before a fault becomes a fire.
- Lights that flicker or dim when appliances switch on
- Circuit breakers or fuses that trip frequently
- Burning smell near power points or the switchboard
- Discoloured or warm power point faceplates
- Power points that spark when you plug something in
- Visible rubber or cloth-insulated wiring in the roof or subfloor
- No safety switches (RCDs) on your switchboard
- Your home was built before 1980 and has never been rewired
If you notice any of these signs, do not delay getting an inspection. AJ Services Group offers electrical safety inspections across Sydney and can advise whether a full rewire or targeted repairs are the right call for your property.
Explore ways to manage the cost of rewiring in NSW
A full rewire is a significant investment, but there are practical ways to manage the cost without cutting corners on safety or compliance.
Get at least three quotes. Pricing varies between electricians. Always compare written quotes that break down labour, materials, and any additional fees. A quote that seems very low is often missing scope items that will appear as extras later.
Bundle work together. If you need a switchboard upgrade, additional power points, or new light fittings, doing it all during the rewire saves labour costs. Getting these done as separate jobs later costs more overall.
Check your home insurance. Some policies offer partial cover for electrical damage caused by old wiring faults. Check with your insurer before the work begins.
Look into government rebates. NSW homeowners may be eligible for rebates on energy efficiency upgrades under the NSW Energy Savings Scheme. While this does not directly cover rewiring, it can offset costs if you are also installing LED lighting or upgrading to energy-efficient appliances at the same time.
Plan your timing. Booking during quieter periods for tradies (typically late autumn or winter in Sydney) can sometimes result in faster availability and more competitive pricing.
FAQs on rewiring a 3-bedroom house in NSW
Do I need council approval to rewire my house in NSW?
You do not need council development approval for internal rewiring work in NSW. However, your licensed electrician must lodge a Certificate of Compliance for Electrical Work (CCEW) with NSW Fair Trading after completing the job. Some work also requires notification to your network provider, either Ausgrid or Endeavour Energy.
How long does it take to rewire a 3-bedroom house?
Most standard 3-bedroom homes in Sydney take between 3 and 6 working days to rewire fully. Homes with brick construction, two storeys, or complex wiring layouts typically take longer. Your electrician should give you a timeline as part of the written quote.
Can I stay in my house while it is being rewired?
In most cases, it is not practical to stay in the home during rewiring. Power will be off for extended periods and walls or ceilings may be opened up for cable access. Many families arrange temporary accommodation for the duration of the work, especially if young children or elderly residents are present.
Is rewiring covered by home insurance in NSW?
Standard home insurance policies generally do not cover the cost of elective rewiring. However, if old or faulty wiring caused damage such as a fire or electrical fault, your policy may cover the resulting damage. Always check your specific policy and speak to your insurer before making assumptions.
What is the difference between a partial rewire and a full rewire?
A partial rewire replaces specific circuits or sections of wiring that are faulty or non-compliant. A full rewire replaces all wiring throughout the home. For homes built before 1980, a full rewire is usually the safer and more cost-effective long-term option, as partial repairs often leave other aged wiring in place.
How do I know if my Sydney home needs rewiring?
The most reliable way is to book an electrical safety inspection with a licensed electrician. Common indicators include frequent tripping, flickering lights, old ceramic fuse boards, and cloth or rubber-sheathed wiring visible in roof spaces. AJ Services Group provides inspections across the Sydney metro area.
Wrap up and next steps
Rewiring a 3-bedroom house in NSW costs between $8,000 and $15,000 for most Sydney homes, with older or more complex properties sitting at the higher end. The investment protects your home, meets current safety standards, and gives you reliable electrical infrastructure for decades to come.
AJ Services Group is a licensed electrical contractor based in Sydney, servicing homes across the metro area and surrounds. If you are ready to get a clear, honest quote for your rewiring project, contact us today to book an inspection or speak with one of our team members about your property.
